The Volkswagen Foundation (via The Ministry of Science and Culture of the State of Niedersachsen), 2000-2002, joint with Wolfgang Stadje (University of Osnabrueck, Germany), title: Stochastic Storage Systems in a Random Environment, total support - DM87,000.

INTAS (funded by the European community), project 265, 2001-2003, joint among teams from several European countries and Israel, Israeli team: Adam Shwartz (Technion) and Offer Kella, title: Mathematics of Stochastic Networks, total support: EU90,000.

The Volkswagen Foundation (via The Ministry of Science and Culture of the State of Niedersachsen), 2004-2006, joint with Wolfgang Stadje (University of Osnabrueck, Germany), title: Reflected Networks, Stability and Martingale Analysis, total support - EU88,000.